code: def test_all_correct_unweighted():
      pin_obj = quantiles.PinballLoss()
      y_true = tf.constant([4, 8, 12, 8, 1, 3], shape=(2, 3))
      loss = pin_obj(y_true, y_true)
      assert loss == 0
  
file_path: addons/tensorflow_addons/losses/tests/quantiles_test.py
imports: import pytest
  import numpy
  import tensorflow
  from tensorflow_addons.losses import quantiles
label_desc: Use image node_id 2 for calling a global function with example usage: test_all_correct_unweighted() without return types